/*! FixedHeader 2.1.2
 * ©2010-2014 SpryMedia Ltd - datatables.net/license
 */

/**
 * @summary     FixedHeader
 * @description Fix a table's header or footer, so it is always visible while
 *              Scrolling
 * @version     2.1.2
 * @file        dataTables.fixedHeader.js
 * @author      SpryMedia Ltd (www.sprymedia.co.uk)
 * @contact     www.sprymedia.co.uk/contact
 * @copyright   Copyright 2009-2014 SpryMedia Ltd.
 *
 * This source file is free software, available under the following license:
 *   MIT license - http://datatables.net/license/mit
 *
 * This source file is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the license files for details.
 *
 * For details please refer to: http://www.datatables.net
 */

/* Global scope for FixedColumns for backwards compatibility - will be removed
 * in future. Not documented in 1.1.x.
 */

/* Global scope for FixedColumns */
var FixedHeader;

(function (window, document, undefined) {

  var factory = function ($, DataTable) {
    "use strict";

    /*
     * Function: FixedHeader
     * Purpose:  Provide 'fixed' header, footer and columns for a DataTable
     * Returns:  object:FixedHeader - must be called with 'new'
     * Inputs:   mixed:mTable - target table
     *  @param {object} dt DataTables instance or HTML table node. With DataTables
     *    1.10 this can also be a jQuery collection (with just a single table in its
     *    result set), a jQuery selector, DataTables API instance or settings
     *    object.
     *  @param {object} [oInit] initialisation settings, with the following
     *    properties (each optional)
     *    * bool:top -    fix the header (default true)
     *    * bool:bottom - fix the footer (default false)
     *    * int:left -    fix the left column(s) (default 0)
     *    * int:right -   fix the right column(s) (default 0)
     *    * int:zTop -    fixed header zIndex
     *    * int:zBottom - fixed footer zIndex
     *    * int:zLeft -   fixed left zIndex
     *    * int:zRight -  fixed right zIndex
     */
    FixedHeader = function (mTable, oInit) {
      /* Sanity check - you just know it will happen */
      if (!this instanceof FixedHeader) {
        alert(
            "FixedHeader warning: FixedHeader must be initialised with the 'new' keyword.");
        return;
      }

      var that = this;
      var oSettings = {
        "aoCache": [],
        "oSides": {
          "top": true,
          "bottom": false,
          "left": 0,
          "right": 0
        },
        "oZIndexes": {
          "top": 104,
          "bottom": 103,
          "left": 102,
          "right": 101
        },
        "oCloneOnDraw": {
          "top": false,
          "bottom": false,
          "left": true,
          "right": true
        },
        "oMes": {
          "iTableWidth": 0,
          "iTableHeight": 0,
          "iTableLeft": 0,
          "iTableRight": 0, /* note this is left+width, not actually "right" */
          "iTableTop": 0,
          "iTableBottom": 0 /* note this is top+height, not actually "bottom" */
        },
        "oOffset": {
          "top": 0
        },
        "nTable": null,
        "bFooter": false,
        "bInitComplete": false
      };

      /*
       * Function: fnGetSettings
       * Purpose:  Get the settings for this object
       * Returns:  object: - settings object
       * Inputs:   -
       */
      this.fnGetSettings = function () {
        return oSettings;
      };

      /*
       * Function: fnUpdate
       * Purpose:  Update the positioning and copies of the fixed elements
       * Returns:  -
       * Inputs:   -
       */
      this.fnUpdate = function () {
        this._fnUpdateClones();
        this._fnUpdatePositions();
      };

      /*
       * Function: fnPosition
       * Purpose:  Update the positioning of the fixed elements
       * Returns:  -
       * Inputs:   -
       */
      this.fnPosition = function () {
        this._fnUpdatePositions();
      };

      var dt = $.fn.dataTable.Api ?
          new $.fn.dataTable.Api(mTable).settings()[0] :
          mTable.fnSettings();

      dt._oPluginFixedHeader = this;

      /* Let's do it */
      this.fnInit(dt, oInit);

    };

    /*
     * Variable: FixedHeader
     * Purpose:  Prototype for FixedHeader
     * Scope:    global
     */
    FixedHeader.prototype = {
      /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
       * Initialisation
       */

      /*
       * Function: fnInit
       * Purpose:  The "constructor"
       * Returns:  -
       * Inputs:   {as FixedHeader function}
       */
      fnInit: function (oDtSettings, oInit) {
        var s = this.fnGetSettings();
        var that = this;

        /* Record the user definable settings */
        this.fnInitSettings(s, oInit);

        if (oDtSettings.oScroll.sX !== "" || oDtSettings.oScroll.sY !== "") {
          alert(
              "FixedHeader 2 is not supported with DataTables' scrolling mode at this time");
          return;
        }

        s.nTable = oDtSettings.nTable;
        oDtSettings.aoDrawCallback.unshift({
          "fn": function () {
            FixedHeader.fnMeasure();
            that._fnUpdateClones.call(that);
            that._fnUpdatePositions.call(that);
          },
          "sName": "FixedHeader"
        });

        s.bFooter = ($('>tfoot', s.nTable).length > 0) ? true : false;

        /* Add the 'sides' that are fixed */
        if (s.oSides.top) {
          s.aoCache.push(that._fnCloneTable("fixedHeader", "FixedHeader_Header",
              that._fnCloneThead));
        }
        if (s.oSides.bottom) {
          s.aoCache.push(that._fnCloneTable("fixedFooter", "FixedHeader_Footer",
              that._fnCloneTfoot));
        }
        if (s.oSides.left) {
          s.aoCache.push(that._fnCloneTable("fixedLeft", "FixedHeader_Left",
              that._fnCloneTLeft, s.oSides.left));
        }
        if (s.oSides.right) {
          s.aoCache.push(that._fnCloneTable("fixedRight", "FixedHeader_Right",
              that._fnCloneTRight, s.oSides.right));
        }

        /* Event listeners for window movement */
        FixedHeader.afnScroll.push(function () {
          that._fnUpdatePositions.call(that);
        });

        $(window).resize(function () {
          FixedHeader.fnMeasure();
          that._fnUpdateClones.call(that);
          that._fnUpdatePositions.call(that);
        });

        $(s.nTable)
        .on('column-reorder.dt', function () {
          FixedHeader.fnMeasure();
          that._fnUpdateClones(true);
          that._fnUpdatePositions();
        })
        .on('column-visibility.dt', function () {
          FixedHeader.fnMeasure();
          that._fnUpdateClones(true);
          that._fnUpdatePositions();
        });

        /* Get things right to start with */
        FixedHeader.fnMeasure();
        that._fnUpdateClones();
        that._fnUpdatePositions();

        s.bInitComplete = true;
      },

      /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
       * Support functions
       */

      /*
       * Function: fnInitSettings
       * Purpose:  Take the user's settings and copy them to our local store
       * Returns:  -
       * Inputs:   object:s - the local settings object
       *           object:oInit - the user's settings object
       */
      fnInitSettings: function (s, oInit) {
        if (oInit !== undefined) {
          if (oInit.top !== undefined) {
            s.oSides.top = oInit.top;
          }
          if (oInit.bottom !== undefined) {
            s.oSides.bottom = oInit.bottom;
          }
          if (typeof oInit.left == 'boolean') {
            s.oSides.left = oInit.left ? 1 : 0;
          } else if (oInit.left !== undefined) {
            s.oSides.left = oInit.left;
          }
          if (typeof oInit.right == 'boolean') {
            s.oSides.right = oInit.right ? 1 : 0;
          } else if (oInit.right !== undefined) {
            s.oSides.right = oInit.right;
          }

          if (oInit.zTop !== undefined) {
            s.oZIndexes.top = oInit.zTop;
          }
          if (oInit.zBottom !== undefined) {
            s.oZIndexes.bottom = oInit.zBottom;
          }
          if (oInit.zLeft !== undefined) {
            s.oZIndexes.left = oInit.zLeft;
          }
          if (oInit.zRight !== undefined) {
            s.oZIndexes.right = oInit.zRight;
          }

          if (oInit.offsetTop !== undefined) {
            s.oOffset.top = oInit.offsetTop;
          }
          if (oInit.alwaysCloneTop !== undefined) {
            s.oCloneOnDraw.top = oInit.alwaysCloneTop;
          }
          if (oInit.alwaysCloneBottom !== undefined) {
            s.oCloneOnDraw.bottom = oInit.alwaysCloneBottom;
          }
          if (oInit.alwaysCloneLeft !== undefined) {
            s.oCloneOnDraw.left = oInit.alwaysCloneLeft;
          }
          if (oInit.alwaysCloneRight !== undefined) {
            s.oCloneOnDraw.right = oInit.alwaysCloneRight;
          }
        }
      },

      /*
       * Function: _fnCloneTable
       * Purpose:  Clone the table node and do basic initialisation
       * Returns:  -
       * Inputs:   -
       */
      _fnCloneTable: function (sType, sClass, fnClone, iCells) {
        var s = this.fnGetSettings();
        var nCTable;

        /* We know that the table _MUST_ has a DIV wrapped around it, because this is simply how
         * DataTables works. Therefore, we can set this to be relatively position (if it is not
         * alreadu absolute, and use this as the base point for the cloned header
         */
        if ($(s.nTable.parentNode).css('position') != "absolute") {
          s.nTable.parentNode.style.position = "relative";
        }

        /* Just a shallow clone will do - we only want the table node */
        nCTable = s.nTable.cloneNode(false);
        nCTable.removeAttribute('id');

        var nDiv = document.createElement('div');
        nDiv.style.position = "absolute";
        nDiv.style.top = "0px";
        nDiv.style.left = "0px";
        nDiv.className += " FixedHeader_Cloned " + sType + " " + sClass;

        /* Set the zIndexes */
        if (sType == "fixedHeader") {
          nDiv.style.zIndex = s.oZIndexes.top;
        }
        if (sType == "fixedFooter") {
          nDiv.style.zIndex = s.oZIndexes.bottom;
        }
        if (sType == "fixedLeft") {
          nDiv.style.zIndex = s.oZIndexes.left;
        } else if (sType == "fixedRight") {
          nDiv.style.zIndex = s.oZIndexes.right;
        }

        /* remove margins since we are going to position it absolutely */
        nCTable.style.margin = "0";

        /* Insert the newly cloned table into the DOM, on top of the "real" header */
        nDiv.appendChild(nCTable);
        document.body.appendChild(nDiv);

        return {
          "nNode": nCTable,
          "nWrapper": nDiv,
          "sType": sType,
          "sPosition": "",
          "sTop": "",
          "sLeft": "",
          "fnClone": fnClone,
          "iCells": iCells
        };
      },

      /*
       * Function: _fnMeasure
       * Purpose:  Get the current positioning of the table in the DOM
       * Returns:  -
       * Inputs:   -
       */
      _fnMeasure: function () {
        var
            s = this.fnGetSettings(),
            m = s.oMes,
            jqTable = $(s.nTable),
            oOffset = jqTable.offset(),
            iParentScrollTop = this._fnSumScroll(s.nTable.parentNode,
                'scrollTop'),
            iParentScrollLeft = this._fnSumScroll(s.nTable.parentNode,
                'scrollLeft');

        m.iTableWidth = jqTable.outerWidth();
        m.iTableHeight = jqTable.outerHeight();
        m.iTableLeft = oOffset.left + s.nTable.parentNode.scrollLeft;
        m.iTableTop = oOffset.top + iParentScrollTop;
        m.iTableRight = m.iTableLeft + m.iTableWidth;
        m.iTableRight = FixedHeader.oDoc.iWidth - m.iTableLeft - m.iTableWidth;
        m.iTableBottom = FixedHeader.oDoc.iHeight - m.iTableTop
            - m.iTableHeight;
      },

      /*
       * Function: _fnSumScroll
       * Purpose:  Sum node parameters all the way to the top
       * Returns:  int: sum
       * Inputs:   node:n - node to consider
       *           string:side - scrollTop or scrollLeft
       */
      _fnSumScroll: function (n, side) {
        var i = n[side];
        while (n = n.parentNode) {
          if (n.nodeName == 'HTML' || n.nodeName == 'BODY') {
            break;
          }
          i = n[side];
        }
        return i;
      },

      /*
       * Function: _fnUpdatePositions
       * Purpose:  Loop over the fixed elements for this table and update their positions
       * Returns:  -
       * Inputs:   -
       */
      _fnUpdatePositions: function () {
        var s = this.fnGetSettings();
        this._fnMeasure();

        for (var i = 0, iLen = s.aoCache.length; i < iLen; i++) {
          if (s.aoCache[i].sType == "fixedHeader") {
            this._fnScrollFixedHeader(s.aoCache[i]);
          } else if (s.aoCache[i].sType == "fixedFooter") {
            this._fnScrollFixedFooter(s.aoCache[i]);
          } else if (s.aoCache[i].sType == "fixedLeft") {
            this._fnScrollHorizontalLeft(s.aoCache[i]);
          } else {
            this._fnScrollHorizontalRight(s.aoCache[i]);
          }
        }
      },

      /*
       * Function: _fnUpdateClones
       * Purpose:  Loop over the fixed elements for this table and call their cloning functions
       * Returns:  -
       * Inputs:   -
       */
      _fnUpdateClones: function (full) {
        var s = this.fnGetSettings();

        if (full) {
          // This is a little bit of a hack to force a full clone draw. When
          // `full` is set to true, we want to reclone the source elements,
          // regardless of the clone-on-draw settings
          s.bInitComplete = false;
        }

        for (var i = 0, iLen = s.aoCache.length; i < iLen; i++) {
          s.aoCache[i].fnClone.call(this, s.aoCache[i]);
        }

        if (full) {
          s.bInitComplete = true;
        }
      },

      /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
       * Scrolling functions
       */

      /*
       * Function: _fnScrollHorizontalLeft
       * Purpose:  Update the positioning of the scrolling elements
       * Returns:  -
       * Inputs:   object:oCache - the cached values for this fixed element
       */
      _fnScrollHorizontalRight: function (oCache) {
        var
            s = this.fnGetSettings(),
            oMes = s.oMes,
            oWin = FixedHeader.oWin,
            oDoc = FixedHeader.oDoc,
            nTable = oCache.nWrapper,
            iFixedWidth = $(nTable).outerWidth();

        if (oWin.iScrollRight < oMes.iTableRight) {
          /* Fully right aligned */
          this._fnUpdateCache(oCache, 'sPosition', 'absolute', 'position',
              nTable.style);
          this._fnUpdateCache(oCache, 'sTop', oMes.iTableTop + "px", 'top',
              nTable.style);
          this._fnUpdateCache(oCache, 'sLeft',
              (oMes.iTableLeft + oMes.iTableWidth - iFixedWidth) + "px", 'left',
              nTable.style);
        } else if (oMes.iTableLeft < oDoc.iWidth - oWin.iScrollRight
            - iFixedWidth) {
          /* Middle */
          this._fnUpdateCache(oCache, 'sPosition', 'fixed', 'position',
              nTable.style);
          this._fnUpdateCache(oCache, 'sTop',
              (oMes.iTableTop - oWin.iScrollTop) + "px", 'top', nTable.style);
          this._fnUpdateCache(oCache, 'sLeft',
              (oWin.iWidth - iFixedWidth) + "px", 'left', nTable.style);
        } else {
          /* Fully left aligned */
          this._fnUpdateCache(oCache, 'sPosition', 'absolute', 'position',
              nTable.style);
          this._fnUpdateCache(oCache, 'sTop', oMes.iTableTop + "px", 'top',
              nTable.style);
          this._fnUpdateCache(oCache, 'sLeft', oMes.iTableLeft + "px", 'left',
              nTable.style);
        }
      },

      /*
       * Function: _fnScrollHorizontalLeft
       * Purpose:  Update the positioning of the scrolling elements
       * Returns:  -
       * Inputs:   object:oCache - the cached values for this fixed element
       */
      _fnScrollHorizontalLeft: function (oCache) {
        var
            s = this.fnGetSettings(),
            oMes = s.oMes,
            oWin = FixedHeader.oWin,
            oDoc = FixedHeader.oDoc,
            nTable = oCache.nWrapper,
            iCellWidth = $(nTable).outerWidth();

        if (oWin.iScrollLeft < oMes.iTableLeft) {
          /* Fully left align */
          this._fnUpdateCache(oCache, 'sPosition', 'absolute', 'position',
              nTable.style);
          this._fnUpdateCache(oCache, 'sTop', oMes.iTableTop + "px", 'top',
              nTable.style);
          this._fnUpdateCache(oCache, 'sLeft', oMes.iTableLeft + "px", 'left',
              nTable.style);
        } else if (oWin.iScrollLeft < oMes.iTableLeft + oMes.iTableWidth
            - iCellWidth) {
          this._fnUpdateCache(oCache, 'sPosition', 'fixed', 'position',
              nTable.style);
          this._fnUpdateCache(oCache, 'sTop',
              (oMes.iTableTop - oWin.iScrollTop) + "px", 'top', nTable.style);
          this._fnUpdateCache(oCache, 'sLeft', "0px", 'left', nTable.style);
        } else {
          /* Fully right align */
          this._fnUpdateCache(oCache, 'sPosition', 'absolute', 'position',
              nTable.style);
          this._fnUpdateCache(oCache, 'sTop', oMes.iTableTop + "px", 'top',
              nTable.style);
          this._fnUpdateCache(oCache, 'sLeft',
              (oMes.iTableLeft + oMes.iTableWidth - iCellWidth) + "px", 'left',
              nTable.style);
        }
      },

      /*
       * Function: _fnScrollFixedFooter
       * Purpose:  Update the positioning of the scrolling elements
       * Returns:  -
       * Inputs:   object:oCache - the cached values for this fixed element
       */
      _fnScrollFixedFooter: function (oCache) {
        var
            s = this.fnGetSettings(),
            oMes = s.oMes,
            oWin = FixedHeader.oWin,
            oDoc = FixedHeader.oDoc,
            nTable = oCache.nWrapper,
            iTheadHeight = $("thead", s.nTable).outerHeight(),
            iCellHeight = $(nTable).outerHeight();

        if (oWin.iScrollBottom < oMes.iTableBottom) {
          /* Below */
          this._fnUpdateCache(oCache, 'sPosition', 'absolute', 'position',
              nTable.style);
          this._fnUpdateCache(oCache, 'sTop',
              (oMes.iTableTop + oMes.iTableHeight - iCellHeight) + "px", 'top',
              nTable.style);
          this._fnUpdateCache(oCache, 'sLeft', oMes.iTableLeft + "px", 'left',
              nTable.style);
        } else if (oWin.iScrollBottom < oMes.iTableBottom + oMes.iTableHeight
            - iCellHeight - iTheadHeight) {
          this._fnUpdateCache(oCache, 'sPosition', 'fixed', 'position',
              nTable.style);
          this._fnUpdateCache(oCache, 'sTop',
              (oWin.iHeight - iCellHeight) + "px", 'top', nTable.style);
          this._fnUpdateCache(oCache, 'sLeft',
              (oMes.iTableLeft - oWin.iScrollLeft) + "px", 'left',
              nTable.style);
        } else {
          /* Above */
          this._fnUpdateCache(oCache, 'sPosition', 'absolute', 'position',
              nTable.style);
          this._fnUpdateCache(oCache, 'sTop',
              (oMes.iTableTop + iCellHeight) + "px", 'top', nTable.style);
          this._fnUpdateCache(oCache, 'sLeft', oMes.iTableLeft + "px", 'left',
              nTable.style);
        }
      },

      /*
       * Function: _fnScrollFixedHeader
       * Purpose:  Update the positioning of the scrolling elements
       * Returns:  -
       * Inputs:   object:oCache - the cached values for this fixed element
       */
      _fnScrollFixedHeader: function (oCache) {
        var
            s = this.fnGetSettings(),
            oMes = s.oMes,
            oWin = FixedHeader.oWin,
            oDoc = FixedHeader.oDoc,
            nTable = oCache.nWrapper,
            iTbodyHeight = 0,
            anTbodies = s.nTable.getElementsByTagName('tbody');

        for (var i = 0; i < anTbodies.length; ++i) {
          iTbodyHeight += anTbodies[i].offsetHeight;
        }

        if (oMes.iTableTop > oWin.iScrollTop + s.oOffset.top) {
          /* Above the table */
          this._fnUpdateCache(oCache, 'sPosition', "absolute", 'position',
              nTable.style);
          this._fnUpdateCache(oCache, 'sTop', oMes.iTableTop + "px", 'top',
              nTable.style);
          this._fnUpdateCache(oCache, 'sLeft', oMes.iTableLeft + "px", 'left',
              nTable.style);
        } else if (oWin.iScrollTop + s.oOffset.top > oMes.iTableTop
            + iTbodyHeight) {
          /* At the bottom of the table */
          this._fnUpdateCache(oCache, 'sPosition', "absolute", 'position',
              nTable.style);
          this._fnUpdateCache(oCache, 'sTop',
              (oMes.iTableTop + iTbodyHeight) + "px", 'top', nTable.style);
          this._fnUpdateCache(oCache, 'sLeft', oMes.iTableLeft + "px", 'left',
              nTable.style);
        } else {
          /* In the middle of the table */
          this._fnUpdateCache(oCache, 'sPosition', 'fixed', 'position',
              nTable.style);
          this._fnUpdateCache(oCache, 'sTop', s.oOffset.top + "px", 'top',
              nTable.style);
          this._fnUpdateCache(oCache, 'sLeft',
              (oMes.iTableLeft - oWin.iScrollLeft) + "px", 'left',
              nTable.style);
        }
      },

      /*
       * Function: _fnUpdateCache
       * Purpose:  Check the cache and update cache and value if needed
       * Returns:  -
       * Inputs:   object:oCache - local cache object
       *           string:sCache - cache property
       *           string:sSet - value to set
       *           string:sProperty - object property to set
       *           object:oObj - object to update
       */
      _fnUpdateCache: function (oCache, sCache, sSet, sProperty, oObj) {
        if (oCache[sCache] != sSet) {
          oObj[sProperty] = sSet;
          oCache[sCache] = sSet;
        }
      },

      /**
       * Copy the classes of all child nodes from one element to another. This implies
       * that the two have identical structure - no error checking is performed to that
       * fact.
       *  @param {element} source Node to copy classes from
       *  @param {element} dest Node to copy classes too
       */
      _fnClassUpdate: function (source, dest) {
        var that = this;

        if (source.nodeName.toUpperCase() === "TR"
            || source.nodeName.toUpperCase() === "TH" ||
            source.nodeName.toUpperCase() === "TD"
            || source.nodeName.toUpperCase() === "SPAN") {
          dest.className = source.className;
        }

        $(source).children().each(function (i) {
          that._fnClassUpdate($(source).children()[i], $(dest).children()[i]);
        });
      },

      /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
       * Cloning functions
       */

      /*
       * Function: _fnCloneThead
       * Purpose:  Clone the thead element
       * Returns:  -
       * Inputs:   object:oCache - the cached values for this fixed element
       */
      _fnCloneThead: function (oCache) {
        var s = this.fnGetSettings();
        var nTable = oCache.nNode;

        if (s.bInitComplete && !s.oCloneOnDraw.top) {
          this._fnClassUpdate($('thead', s.nTable)[0], $('thead', nTable)[0]);
          return;
        }

        /* Set the wrapper width to match that of the cloned table */
        var iDtWidth = $(s.nTable).outerWidth();
        oCache.nWrapper.style.width = iDtWidth + "px";
        nTable.style.width = iDtWidth + "px";

        /* Remove any children the cloned table has */
        while (nTable.childNodes.length > 0) {
          $('thead th', nTable).unbind('click');
          nTable.removeChild(nTable.childNodes[0]);
        }

        /* Clone the DataTables header */
        var nThead = $('thead', s.nTable).clone(true)[0];
        nTable.appendChild(nThead);

        /* Copy the widths across - apparently a clone isn't good enough for this */
        var a = [];
        var b = [];

        $("thead>tr th", s.nTable).each(function (i) {
          a.push($(this).width());
        });

        $("thead>tr td", s.nTable).each(function (i) {
          b.push($(this).width());
        });

        $("thead>tr th", s.nTable).each(function (i) {
          $("thead>tr th:eq(" + i + ")", nTable).width(a[i]);
          $(this).width(a[i]);
        });

        $("thead>tr td", s.nTable).each(function (i) {
          $("thead>tr td:eq(" + i + ")", nTable).width(b[i]);
          $(this).width(b[i]);
        });

        // Stop DataTables 1.9 from putting a focus ring on the headers when
        // clicked to sort
        $('th.sorting, th.sorting_desc, th.sorting_asc', nTable).bind('click',
            function () {
              this.blur();
            });
      },

      /*
       * Function: _fnCloneTfoot
       * Purpose:  Clone the tfoot element
       * Returns:  -
       * Inputs:   object:oCache - the cached values for this fixed element
       */
      _fnCloneTfoot: function (oCache) {
        var s = this.fnGetSettings();
        var nTable = oCache.nNode;

        /* Set the wrapper width to match that of the cloned table */
        oCache.nWrapper.style.width = $(s.nTable).outerWidth() + "px";

        /* Remove any children the cloned table has */
        while (nTable.childNodes.length > 0) {
          nTable.removeChild(nTable.childNodes[0]);
        }

        /* Clone the DataTables footer */
        var nTfoot = $('tfoot', s.nTable).clone(true)[0];
        nTable.appendChild(nTfoot);

        /* Copy the widths across - apparently a clone isn't good enough for this */
        $("tfoot:eq(0)>tr th", s.nTable).each(function (i) {
          $("tfoot:eq(0)>tr th:eq(" + i + ")", nTable).width($(this).width());
        });

        $("tfoot:eq(0)>tr td", s.nTable).each(function (i) {
          $("tfoot:eq(0)>tr td:eq(" + i + ")", nTable).width($(this).width());
        });
      },

      /*
       * Function: _fnCloneTLeft
       * Purpose:  Clone the left column(s)
       * Returns:  -
       * Inputs:   object:oCache - the cached values for this fixed element
       */
      _fnCloneTLeft: function (oCache) {
        var s = this.fnGetSettings();
        var nTable = oCache.nNode;
        var nBody = $('tbody', s.nTable)[0];

        /* Remove any children the cloned table has */
        while (nTable.childNodes.length > 0) {
          nTable.removeChild(nTable.childNodes[0]);
        }

        /* Is this the most efficient way to do this - it looks horrible... */
        nTable.appendChild($("thead", s.nTable).clone(true)[0]);
        nTable.appendChild($("tbody", s.nTable).clone(true)[0]);
        if (s.bFooter) {
          nTable.appendChild($("tfoot", s.nTable).clone(true)[0]);
        }

        /* Remove unneeded cells */
        var sSelector = 'gt(' + (oCache.iCells - 1) + ')';
        $('thead tr', nTable).each(function (k) {
          $('th:' + sSelector, this).remove();
        });

        $('tfoot tr', nTable).each(function (k) {
          $('th:' + sSelector, this).remove();
        });

        $('tbody tr', nTable).each(function (k) {
          $('td:' + sSelector, this).remove();
        });

        this.fnEqualiseHeights('thead', nBody.parentNode, nTable);
        this.fnEqualiseHeights('tbody', nBody.parentNode, nTable);
        this.fnEqualiseHeights('tfoot', nBody.parentNode, nTable);

        var iWidth = 0;
        for (var i = 0; i < oCache.iCells; i++) {
          iWidth += $('thead tr th:eq(' + i + ')', s.nTable).outerWidth();
        }
        nTable.style.width = iWidth + "px";
        oCache.nWrapper.style.width = iWidth + "px";
      },

      /*
       * Function: _fnCloneTRight
       * Purpose:  Clone the right most column(s)
       * Returns:  -
       * Inputs:   object:oCache - the cached values for this fixed element
       */
      _fnCloneTRight: function (oCache) {
        var s = this.fnGetSettings();
        var nBody = $('tbody', s.nTable)[0];
        var nTable = oCache.nNode;
        var iCols = $('tbody tr:eq(0) td', s.nTable).length;

        /* Remove any children the cloned table has */
        while (nTable.childNodes.length > 0) {
          nTable.removeChild(nTable.childNodes[0]);
        }

        /* Is this the most efficient way to do this - it looks horrible... */
        nTable.appendChild($("thead", s.nTable).clone(true)[0]);
        nTable.appendChild($("tbody", s.nTable).clone(true)[0]);
        if (s.bFooter) {
          nTable.appendChild($("tfoot", s.nTable).clone(true)[0]);
        }
        $('thead tr th:lt(' + (iCols - oCache.iCells) + ')', nTable).remove();
        $('tfoot tr th:lt(' + (iCols - oCache.iCells) + ')', nTable).remove();

        /* Remove unneeded cells */
        $('tbody tr', nTable).each(function (k) {
          $('td:lt(' + (iCols - oCache.iCells) + ')', this).remove();
        });

        this.fnEqualiseHeights('thead', nBody.parentNode, nTable);
        this.fnEqualiseHeights('tbody', nBody.parentNode, nTable);
        this.fnEqualiseHeights('tfoot', nBody.parentNode, nTable);

        var iWidth = 0;
        for (var i = 0; i < oCache.iCells; i++) {
          iWidth += $('thead tr th:eq(' + (iCols - 1 - i) + ')',
              s.nTable).outerWidth();
        }
        nTable.style.width = iWidth + "px";
        oCache.nWrapper.style.width = iWidth + "px";
      },

      /**
       * Equalise the heights of the rows in a given table node in a cross browser way. Note that this
       * is more or less lifted as is from FixedColumns
       *  @method  fnEqualiseHeights
       *  @returns void
       *  @param   {string} parent Node type - thead, tbody or tfoot
       *  @param   {element} original Original node to take the heights from
       *  @param   {element} clone Copy the heights to
       *  @private
       */
      "fnEqualiseHeights": function (parent, original, clone) {
        var that = this;
        var originals = $(parent + ' tr', original);
        var height;

        $(parent + ' tr', clone).each(function (k) {
          height = originals.eq(k).css('height');

          // This is nasty :-(. IE has a sub-pixel error even when setting
          // the height below (the Firefox fix) which causes the fixed column
          // to go out of alignment. Need to add a pixel before the assignment
          // Can this be feature detected? Not sure how...
          if (navigator.appName == 'Microsoft Internet Explorer') {
            height = parseInt(height, 10) + 1;
          }

          $(this).css('height', height);

          // For Firefox to work, we need to also set the height of the
          // original row, to the value that we read from it! Otherwise there
          // is a sub-pixel rounding error
          originals.eq(k).css('height', height);
        });
      }
    };

    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
     * Static properties and methods
     *   We use these for speed! This information is common to all instances of FixedHeader, so no
     * point if having them calculated and stored for each different instance.
     */

    /*
     * Variable: oWin
     * Purpose:  Store information about the window positioning
     * Scope:    FixedHeader
     */
    FixedHeader.oWin = {
      "iScrollTop": 0,
      "iScrollRight": 0,
      "iScrollBottom": 0,
      "iScrollLeft": 0,
      "iHeight": 0,
      "iWidth": 0
    };

    /*
     * Variable: oDoc
     * Purpose:  Store information about the document size
     * Scope:    FixedHeader
     */
    FixedHeader.oDoc = {
      "iHeight": 0,
      "iWidth": 0
    };

    /*
     * Variable: afnScroll
     * Purpose:  Array of functions that are to be used for the scrolling components
     * Scope:    FixedHeader
     */
    FixedHeader.afnScroll = [];

    /*
     * Function: fnMeasure
     * Purpose:  Update the measurements for the window and document
     * Returns:  -
     * Inputs:   -
     */
    FixedHeader.fnMeasure = function () {
      var
          jqWin = $(window),
          jqDoc = $(document),
          oWin = FixedHeader.oWin,
          oDoc = FixedHeader.oDoc;

      oDoc.iHeight = jqDoc.height();
      oDoc.iWidth = jqDoc.width();

      oWin.iHeight = jqWin.height();
      oWin.iWidth = jqWin.width();
      oWin.iScrollTop = jqWin.scrollTop();
      oWin.iScrollLeft = jqWin.scrollLeft();
      oWin.iScrollRight = oDoc.iWidth - oWin.iScrollLeft - oWin.iWidth;
      oWin.iScrollBottom = oDoc.iHeight - oWin.iScrollTop - oWin.iHeight;
    };

    FixedHeader.version = "2.1.2";

    /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
     * Global processing
     */

    /*
     * Just one 'scroll' event handler in FixedHeader, which calls the required components. This is
     * done as an optimisation, to reduce calculation and proagation time
     */
    $(window).scroll(function () {
      FixedHeader.fnMeasure();

      for (var i = 0, iLen = FixedHeader.afnScroll.length; i < iLen; i++) {
        FixedHeader.afnScroll[i]();
      }
    });

    $.fn.dataTable.FixedHeader = FixedHeader;
    $.fn.DataTable.FixedHeader = FixedHeader;

    return FixedHeader;
  }; // /factory

// Define as an AMD module if possible
  if (typeof define === 'function' && define.amd) {
    define(['jquery', 'datatables'], factory);
  } else if (typeof exports === 'object') {
    // Node/CommonJS
    factory(require('jquery'), require('datatables'));
  } else if (jQuery && !jQuery.fn.dataTable.FixedHeader) {
    // Otherwise simply initialise as normal, stopping multiple evaluation
    factory(jQuery, jQuery.fn.dataTable);
  }

})(window, document);

